Roof slate



FIG. 1 is a top plan view of a single air roof slate according to the design;

FIG. 2 is a bottom plan view of the roof slate of FIG. 1;

FIG. 3 is a side elevation view of the roof slate of FIG. 1;

FIG. 4 is a perspective view of the roof slate of FIG. 1; and,

FIG. 5 is an end elevation view of the roof slate of FIG. 1. 

CLAIM The ornamental design for roof slate, as shown and described. 